Vacuum pump structure

ABSTRACT

A vacuum pump structure includes a motor, two pump bodies, and a grip. The two pump bodies are connected to the motor and driven by the motor, respectively. Each pump body has a pump chamber with a connection port for connecting a suction pipe. The grip has two ends respectively connected to the two pump bodies for carrying the vacuum pump structure. A communication pipe is disposed inside the grip. The communication pipe is in communication with the pump chambers of the two pump bodies. The two pump bodies jointly perform two working modes at the same time to improve work efficiency.

FIELD OF THE INVENTION

The present invention relates to a vacuum pump, and more particularly to a vacuum pump structure having two pump bodies.

BACKGROUND OF THE INVENTION

Common electrical equipment, such as air conditioners, refrigerators, etc., circulate the refrigerant in the piping system to achieve a refrigeration effect through the process of evaporation and condensation. In order to avoid damage to the system caused by air remaining in the piping system during the operation of the refrigerant, it is necessary to first evacuate the air in the piping system by a vacuum pump, namely, vacuum pumping.

A common vacuum pump has a motor and a pump body. The pump body is connected to a space to be pumped through a suction pipe. The pump body is driven by the motor to perform pumping. However, the pumping efficiency performed by only one pump body is insufficient, and there is a disadvantage of spending too much time. Therefore, the industry has developed a vacuum pump with two pump bodies that are connected by a motor. Each pump body has a connection port for connecting a suction pipe. In use, as shown in FIG. 5, each pump body 7A, 7B is connected to a space 8A, 8B to be pumped through a suction pipe 71A, 71B. Under the driving of the motor 9, the pump bodies 7A, 7B simultaneously pump their corresponding spaces 8A, 8B, respectively. This is an example of the use of two pump bodies 7A, 7B to perform two pumping operations at the same time.

FIG. 6 illustrates another use state of the above conventional device. The connection ports of the two pump bodies 7A, 7B are connected by a three-way pipe 72. The three-way pipe 72 is connected to a space 8C to be pumped. Under the driving of the motor 9, the pump bodies 7A, 7B simultaneously pump the space 8C. This is an example of the use of two pump bodies 7A, 7B to perform one pumping operation at the same time.

However, in the state as shown in FIG. 6, the connection ports of the pump bodies 7A, 7B have been occupied by the three-way pipe 72, so that it is no longer possible to externally connect another suction pipe. As a result, only one space 8C can be pumped through the three-way pipe 72, that is, only one pumping operation can be performed. It is impossible to perform the working mode that two pump bodies 7A, 7B jointly perform two pumping operations at the same time.

Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a vacuum pump structure, which is provided with a built-in communication pipe communicating with two pump bodies, thereby vacating the connection port of each pump body for respectively connecting different spaces to be pumped. Each space can be jointly pumped by the two pump bodies simultaneously, thereby improving the pumping efficiency.

Another object of the present invention is to provide a vacuum pump structure, which is provided with a grip having the communication pipe communicating with the two pump bodies, so that there is no need for additional structure.

In order to achieve the above objects, the present invention provides a vacuum pump structure, comprising a motor, two pump bodies, and a grip. The two pump bodies are connected to the motor and driven by the motor, respectively. The pump bodies each have a pump chamber. The pump chamber is provided with a connection port for connecting a suction pipe. The grip has two ends respectively connected to the two pump bodies for carrying the vacuum pump structure. A communication pipe is disposed inside the grip. The communication pipe is in communication with the pump chambers of the two pump bodies.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the pump body of the present invention;

FIG. 3 is a cross-sectional view of the grip of the present invention;

FIG. 4 is a schematic view of the present invention when in use;

FIG. 5 is a first schematic view of a conventional vacuum pump when in use; and

FIG. 6 is a second schematic view of the conventional vacuum pump when in use.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

Referring to FIG. 1, a vacuum pump structure according to an embodiment of the present invention comprises a motor 1 and two pump bodies 2A, 2B. The motor 1 is disposed on a base 3. The two pump bodies 2A, 2B are located at two sides of the motor 1 and connected to the motor 1, respectively. The pump bodies 2A, 2B each have a pump chamber (not shown). The pump chamber is provided with a connection port 21A, 21B for connecting a suction pipe. The two pump bodies 2A, 2B are driven by the motor 1 to run, thereby performing an air pumping operation.

As shown in FIG. 2, each of the connection ports 21A, 21B is provided with a check valve 23 adjacent to the pump chamber 22. When air is drawn into the pump chamber 22 via the suction pipe to pass through the check valve 23, it is blocked by the check valve 23 and cannot flow back, thereby ensuring that the air pumping operation is performed smoothly. Each of the connection ports 21A, 21B is provided with a pressure gauge 24 in front of the check valve 23 for measuring the degree of vacuum, thereby accurately measuring the degree of vacuum. In this embodiment, each of the connection ports 21A, 21B is provided with a branch pipe 25 in front of the check valve 23. The pressure gauge 24 is disposed on the branch pipe 25.

The vacuum pump structure further comprises a grip 4. Two ends of the grip 4 are fixedly connected to the two pump bodies 2A, 2B, respectively, thereby enabling the user to carry the entire device by hand. A communication pipe 41 is disposed inside the grip 4, as shown in FIG. 3. The communication pipe 41 is in communication with the pump chambers of the two pump bodies 2A, 2B, so that the space between the two forms a communication state. Accordingly, when the motor 1 drives the two pump bodies 2A, 2B to run for pumping, the two pump bodies 2A, 2B generate a joint operation through the communication pipe 41, thereby improving the pumping efficiency. In other words, for the space to be pumped, the two pump bodies 2A, 2B are communicated with each other via the communication pipe 41, so that the space is simultaneously pumped by the two pump bodies 2A, 2B. Therefore, the pumping efficiency is improved.

Furthermore, the present invention is more suitable for performing two pumping operations simultaneously. As shown in FIG. 4, for two spaces 5A, 5B to be pumped, the connection port 21A of one pump body 2A of the present invention is connected to the space 5A through a suction pipe 6A, and the connection port 21B of the other pump body 2B is connected to the space 5B through another suction pipe 6B. After the motor 1 is started to operate the two pump bodies 2A, 2B, the two spaces 5A, 5B are simultaneously pumped. However, since the two pump bodies 2A, 2B are in communication with each other via the communication pipe 41, in addition to the space 5A, the pump body 2A communicates with the pumping space 5B via the communication pipe 41; in addition to the space 5B, the pump body 2B communicates with the space 5A via the communication pipe 41. The two pump bodies 2A, 2B contribute to the pumping operation for the respective spaces 5A, 5B, so that the respective spaces 5A, 5B can be simultaneously pumped by the two pump bodies 2A, 2B. Thereby, the operation mode that two operations are jointly performed by the two pump bodies 2A, 2B at the same time is constructed, and the pumping efficiency of the respective spaces 5A, 5B is improved.

Another advantage of the present invention is that the communication pipe 41 communicating with the two pump bodies 2A, 2B is embedded in the grip 4. The purpose of connecting the two pump bodies 2A, 2B can be achieved without additional construction, thereby simplifying the overall structure.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims. 

What is claimed is:
 1. A vacuum pump structure, comprising: a motor; two pump bodies, connected to the motor and driven by the motor, the pump bodies each having a pump chamber, each of the pump chambers being provided with a connection port for connecting a suction pipe; a grip, having two ends respectively connected to the two pump bodies; a communication pipe being disposed inside the grip, the communication pipe being in communication with the pump chambers of the two pump bodies.
 2. The vacuum pump structure as claimed in claim 1, wherein the connection port of at least one of the pump bodies is provided with a pressure gauge for measuring the degree of vacuum.
 3. The vacuum pump structure as claimed in claim 1, wherein the connection port of each of the pump bodies is provided with a check valve, and the connection port is provided with a pressure gauge in front of the check valve for measuring the degree of vacuum. 